Doorcheck



May 27., 0- w. F. HENDVRY 1,759,846 7 DOORGHECK Fil ed Sept. 21, 1927 2 Sheets-Shet 1 INVENTOR ATTORNEY W. F. HENDRY May 27, 1 930.

DOORCHECK Filed Sept. 21, 1927 2 Sheets-Sheet 2 INVENTOR M 1. m- A4 BY ATTORNEY This invention'relste'st la, modification of orimprovement in the ltypebf door ehe'ok disjclosed theUiiited States Patent 1,6:7'I',6 14: granted to HenrygsmithiMayfli),"I928. i

"Thedoor' oheo'k disolosed in;the :boizeinen V itioned 'applioatjionconsists, j of 1 a {rotatable difum; an ahutme ntand 1a wedge whioh'isfso' 'positionedas too-be drawninb etween the abut-q 'inent and the driimfwhen the dru mis rotated in one direotion; du'etof the Closing ofthe door i to which the 'door oheek is;attached; and

7 "thus int oduce a braking aotionwhich causes the door to shu-t very slowly 'unde'r the ini close quickly "foI Ya portion of its travel and then to be" checked: sufiiciently :to; prevent I fluenoe of the-usual .1

i o i i i i @1601 o i wing, which is assooiatedwith the'doo'roheck; 3'

, It is sometimes 'desirahleqtohaye a door slamming; just before thefdoor i'emhes a 'olosedposition'. '1 This is partioi larly' true of 7, screen 'doorsflwhere it I "desiied-it'o keepout insects; "i j i 3; 11., Q ,1 The object ofiny'inv ention isf to so modify sthe- @oonst'ruction of the-door" cheek. disclosed in the above mentionedapplication [as to "permit ,a dooru'pon which such"a oheck is mounted ito close rapidly [11p to Bi-certain angleandthen to close slowly under, the in- 4 Q fluenee of the braking 'aotion of the check in 1 the same manner that "it lwoilldif controlled by a hydraulic or;pneflmatiepheck: 7

This and other objects and' adjvantagesmd,

thfl nanner of facotzi lplishing' them" will he more clearlyfiinde'rstood 'by inference;tothe folldwing de c i e dj hsm qmpan drawlngsi is i shoe with my invention; u L

Fig; ill t a s, he:

In-{the drawings Fig. o ilinstrtes a; "Plan View of a door checkconstruoted in .ao'ord- Fig. 2is a View in elevation'ofthe door cheokshownin Fig.1;

applied-tea doori- I 1 iFighis aseotional dooi'eheck 1 also corresponds to a" seotion witaken along sec- 9; portion 'ofthe door drum illustfated in' Fig. 5.

oq iheick si i y I mm V I AM F- 1 3 F se -me onms mos I0 MANHATTAN ELEC EI CQMJ ANZflN-G QFYKEWLYORKJPNIY5 QQR Q AT ON rmessmnv- 5 s da s Fi 1 Fig. 6 is a perspectiYe cheek to a-do o 'i A's shown in Fig.1?) the door oheokis" attached to ag door-3 hyfine'ans"ozt*the.

View ofwpoftion of tension adjusting n'eans-of the door'.

Fig, 8 is aiderspectiveyieirt ofa seotionof i the-door check shoWingthe hraki-ng Wedge *3 In the drawings referenoe'nnmeral lind ibracket 2 and is operated through theaaotion of a QIeV'er arni 4 attachedto'therot tahle shaft 50f the" door check. Interoonneoted,

with the leveria im .Lis 'a Tod 6 which is adjust f .abiyfittaohed to whinged s pport 'n ol nted 7 I j on the door 2111110 8.

T Thjdoof oheok consists of arhousing l-haV- "ing cover 117(Whi0h encloses a rotatziblei 3 shsft fi mounted ithin a sleeve 9' andhaving sebhred-thereto a brake drum lO' and a bear, v

ing, member Y Mounted aroungil i and at;

tmehed at one end, to sleeve 9 is a-flst springj 12, Which-spring is connected at its enteredge Y s to'the housing 1'. Thespring' may be'seoured -'to'the.s1eeve '9 by means of a' hook in the end 'hetiweenithe spring 12'and the'b'rake drumi10 isa flat/spacing Washer '14; which serves meres'o il i v of thespringand a cooperating, slot in the v sleeye andm ay be ls'eonred to'the housing 1 in likefgshiomassh wn at13(F-ig;1)i' Placed U o; p Chi .W Qh may? be pl 01.1: the L spring'12' from gettingfon the hrakef-drum. Q;

In order tohfold the sle'eve9fin its p'roper positi'on'aj small spring Wire key 15 is provided, The bearing member 11 whi'ch'is fastened to shaft [5 is] j'ourn aled 'within an" inwardly I 'turnedportionlfiof thec'over platel? ofithe I V housing .1. In iorder 'to intereonnectthe" sleeve!) to theshaft-h so that the shaft'izvhen a i it is rotate'djwillbe influenced by theaot-ion'of} the s rin 12,3 keymember 181s niounted'pn w .the shzi-ftfi and is prevented from tuining thereonduetothe fact thattheopening'in-the I, key member is 'madethesjame shape and'si'ze f 'asth shaftfir This key, while it is not free i, [the door Will not let'eh its ins trethe I o the door is closed, very sl owiy a inntileted 'seeti on 40 is provide'dfiirth permits the door freely' to Close under. the a'ction of the spring 1*2. "\Vh'ere'isuch e mue1a= jti on is" provi'ded the i movement ,o-f the. door Tis-iretarded' lip-to at osition jus-t before, the

{door "latches; then: th (1 brakingzi eti on of the d erzsegsre WithoLTt'taking' into leonsi-deretion the do; i

- j tion of the' sprirrg' 32, it-will be seenthet when theful l y opened door-is released and allowed to'cl'o'se under-the ectionrof thespring 12 that the rotation of the brakedrenij l' Wil l jce u-se abrekih g a oti-on tebeeaxerfied' by the brake shoe 23 which braking notion W i Control the olo singfrnotionof the door and oeuse it to shut gently at; any desired?Velocityli "Asil l some cese's'it may be deg eble te adjust the emmzlek This mutilation 4-0; is; so pos'itio that?" just be;

fore the ew-mews eeemg po'si tionth'e mutilation comes 1 into position opposite thebr'zike shoe 23, which reduces the'pres sure'between theishoe andqd rem and causes braking ection' to be rel-"alsdl and in turh snapped shut under t e f ul l'ehel-nnretarded fia'otionaoif thespring; I p

this type of door ehe'ck o'imakethefens'ion V t. isypreferwble with ofthe-"doeilel'osing spring: 12 j-ust sufiicieiit to i le'tch the door against LeffelrQfriotionf-etc;- s

'Asit is desired: iirsornepa ses, for example Wh'er'ethe 'd ooroheck-rsmsed wlthiscreendoors to keep. exit] the. insects, toielos'e ithe *door 5 quickly for theni-ajfor portionbftifis trhveli v thiansloW itiup:sufiieiently, soxth at it does 1 r not slam; the spring; 32 end-its cooperating a parts h ar've 'beeii' provided.."Whenathe fdoor is.- opened' from I :tclosedtpositi'on'the priojrec' ti-on 36' of the"sprihg32 1noi es;as; a result of thearotati'onof-th'e brake dru-In 110;! until it oonte'ctswith the projeeti o 0, the:brake shoe; "As soon, "as'ritmeziches this';;.-positi-on,

due to thei.initialltension; o -he a'spring 32', it Withdraws the-:breke slme slig tl-yfrom its position between, the abutm t-' brake drum eeegeimet e et-m t the can allowed" to close .t'

V ivspri ng'29gf i-Upon' retationi ofithebrek e drum,

es? ineident'tor'th'e ope'ningmf; the door; the spring .still furtherf withdrewsgthe bralie shoe from its position, and so in ko'rder' to prevent Qeer e' ev m et fl he e eSh -e st i isp ri e. t e we ereh stopistrilies against the guide .mem-bers 25 mi p r n t e grew ,m r'e intfof, the hq c-eewere. After the; door has "fully" 'openee a-nd filth out ret'ziirdetion fron'i the Bakelite-u til the projection 31 on thebiuin'comesinto moves- "slowly under seen that the-spring 12 is wound'u'p eipreoer :is immediately end the O rOtenes freely as set forth in: the foll-owin emheeeeee" i the s r i g ez I be drawn 7 in between the abutment and drum" uilder the action of the spring 291' Asthe shoe V d d '7 p I V is nowin contact with the drurnlO a braking; i 1

eetionwill be exerted :and the rotzttion of shaft 5 and corresponding niotingof the/ dO0I' Wl11 be retarded in such 'manneras' to cause 'ethe door to close gently during "the remeiningfportion of its movement- When n 3 v mutilation 40 is provided on the drain 10, 1

"thee-"door closes gently, as just sta ted,"untilgi fs thei'mutilation reaches the friction wedge I1} when the braking action willbe releasedend' the door snapped shirt under the free action of spring 12. The projection :31 maybeplec'e'dqet any desired position on thedrum close freely up to a, point just before it latches zindfthen be caused-t0 slow up suflieiently so that itfdoes not slain, or the projection earrb'e so" positioned that: the door swings freely for but a small porti'onof its traJ-Veland-then the brake shoe.

10 and hence the door" can be permitted to '3 the retarding action j v From the 'foregoi n-gi desoription' i-t w-ill b e determined amount when the. check is in its operative position on a; door Shonldiitbe; V

desired for anyreason, such-as inspection, or p lrepairg 't'o removethe check from the' door vwithout'allowing the spring to unwindoom pletely a stop 42 might be'seeuredtothe" hoesin gsl; in a" suitable position. The projeo 5 tiontglvon dru m 10 Would,3When;the Check 7 wesremoved' from the.door, due't0-thei111 w r00 1 'endprevent further lineoiling ofthe spring L 's a p The'act'ionjofspring 32is suelrthat it wi'l l i Q also tend to shut the doorup to'the point 7 Where the shoe23 is allowed to exert its braking action. This feature aids'in theearg r ying outof the closing operationes'abo've j deseribed, forithe reason that thespring ten sion tending to close the door 7 daring the freeportion of its swing isgreeter thanthat' 4 tending to clownafter the braki g action is exerted."

:It Will be 'seenthat'theehoi ediselosedsi f if f; I

pl ezfriejtion check canbe a dj uj's'ted to a V exactly the manner that a hydraulic orf'pneir Vices; I It IS tienlele'e mbodiment of my invention',-'I donot f fi d rs; pistons and vali es used 'i'n sfi c hdee a deperturefromthe spiritiofth'einvention, v

1.v In "a damping" meenefep age-name merit and a wed einovabl'e vto a o'sitionb 'bodisge rotatable dr umgest'etione y abut Q r font-thrusting the lwedgej between the drum and abutment and means' attached to {the- 1; drumlefor opposing V the "actionof said spring out et engage;

i "ai1dfn1aint'aining,he Wedge went w h he druma 2; 'door-heckga rotatabledifiiin, a sta $101 131? abutment and a wedgeiniovaliaiy posi tioned between the dru'ni an d the ,fa'butment ableby thef d'rn n for naintainingsaidWedge V V ont ofiengagemeiitwith the LC-[111111 d'uringa portion of'thefrotzition Qfthe, drum.

i tionarfabiitment -and ,a-Wedge inovablypositioned between theidru-rnj and 7 the abutment, o rgn eans tending to'lthriist the Wedge between 1 r V izthe drnrn and the abutmentiand a spring at during a' portionofthe rotationof the drum.

' bodies, arotatable membena 'stationaryabutthrust. the Wedge between the member and the abutment, and means responsive :to rota- 'on of the;said member forinaintainingsaid Wedge' outfof engagement with said member a Iduringa iportion-'oftherotationoftasaid meme 7 V. .N r

her 1 for disengaging saidrjarmf from ithe projecftion on said we'dgeata given :angn1ar'post tionoffsaid member; 'GQInf-a'fidooroheok, a rotatable imember, a mainuspring for said member alibrake: asso- {'1 ciated: with *said ame mber, auxiliary j spring e nsfor assisting the-rotationof said rotati i g ia iction mem e ifon, r tardi g mally. held in brakin'g' position tinder {presi sure; and -,means mounted on said shaft for tion' ofithe sWingof-said door;

" 8. In aLdOOr-QheCk, ,ash'aft V I 1neans"tending 1;to thrnst' th 'wedge jbet ween the drumand the abutment andineans: open- 1' V ing "said; brake, means froln acting i g f i' 3. In asdoor-oheck a 'rotatabledru ma I swinging open oftheldoorito a eertainposi I I V V I I 7 tion, for rendering said-brake in'eflectiyedurf tache'd fto; the -C11'Ui11' for -ijnaintaining iis'aid "Wedg e yout' of engagement withgtheidrnmthe door. 7

- #4.:In1a damping 'means :fonosc'illating;

; le la d i g VP i II E'bB WB F" including a spring' arm responsive to "the" member and'fthe abutment, means tending to,

a the correspon'ding:-portion-f of r the closing-V. swing of'the doorysaid spring arm-ser-Vingto .initial'a ortion ofit's-swinglgf 4 w a r, j '12.jA'I neehanism adapted to c1ose3 1oor,"" .i5f'A door-check" comprising a; rotatable ineinber lan abutmenti ncl a Wedge positioned be wee e,m mb ra abu m door, means for niaintaininggsaid member in? p i g d ng i0 "th u the we geb tw fi an inactive position during the initial portion themember-andthe-abutment,a spring-arm" operable; {by said member, andjforoibly r-en fgaging a projectionijon saidjvedges'o as to I maintain said Wedgeont'of engagement'twith; said {membeig and a *proj eotion o11:said;ine1n- T remaining portion oflthe' s ing" of the door, :and separate means forfrend'er ng saldmem Hfor retarding swinging ofthe doorgand'means a in' o t dwei n p v n i sa d 'brake means from, actingdnringaportion of r r r v v 1 r (f pr nt ng a eansfrom atingidur able inemberaa l xneans 'for s multaneonsly' renderlng sa d 1a11x1l1-aryspring in'eans f n-g n sponsit e' toswinging of the door, .a brake "in- V. swinging ofthe dQOI' ZSE1id member' b-ein mqr to rotation ofthel drain 'f orf n'aintaining said} i'edueifnglthe' said :pressure and; relieving the raking action-bf said'meniber during a pong Y ing aiportion'of the: rotation of the drnniand' a'mutilationon said drum for preventing said L 1 i 125 meta-span e o x n ab n ti du in s 'yeltoxswinging of the door, a brake include "ingfa vfriction member for -retarding; swing-V ngcof thedoor; 'aspringarm for engagingsaid member and rendering it inoperative} to" '-'1 ;etard said door i 'during a Portion. of. the

15. a brake mean agrotatable drum;

of guides .for said? wedge and stops; on;

swing of said and meansse'cni ed to said ishaft fordiseng'aging'. said iarm,andsaidi Q n member dnring the remaindenofthe swing Ofih do ro l owd me ber t i ta d said'doonjj lflfi 701 9. In ado0r-eheok,,a friction brake'normal- 1y in operativeeondition, means for retarding. V swinging of the'i'door and spring mjeans, r e-7;,

'sp n e I kein n Of h 0199 02 certain predetermined position; for'fpreizent- I "1017A door-check e e t a to 01' se iaidioor in a desired manner-{comprising a'brak rvfor retarding the closing otthe door? and ineans1 including: 5a ,,-spri-ng ,arn1 1 responsive to the;

ingthe initial portion of the olosing swin off -7 "i j 7 Q85 11 Agdoor-eheekadapted-tofcl'osefa door-- in a desired ma-nner,oomprising' ahrake f0? retardingthe closing of the door and means swinging of the door Joetn reen' certain limits, I for rendering-'qsaid brakeinefi'e'cti ve during assist in'.e1osing'the door-jduring qomprisingfa "brake inehiding a {fri ction'alr member for 1 retarding the swinging of the berinaotive in" another position of-the door t '13, In a;door check; airictionbrake, neaiisj comprising. spring armiesponsiiie toflthe Y theswingofsaid doorjandffseparate"means I 5 ing another portion of thei swin'g of the door "14;. 1111 a Tdoor joheck,'-; a -rotatab1e drliln' i the drtin and the 'abiitnientslnieans responsive Wedge out of engagementwi'th mediu a portion of, the rotation of "the: said an abiltnlent; a friotion wedgelpositioned be tweensaid drum and -nsaid' abutment, a pair' V wedge for limiting longitudinal movement *of the wedge relative to the guides.

16. In a door check a hollow brake'drum in the drum having one endattached to the drum and the other end projecting out by i the rim of the drum so: as to be engageable by the said-projection.

, Intestimony whereof, I have" signed my name to this specificationthis QOthday of September, 1927.

WILLIA F. HENDRY.

as I 

